Final Fantasy screenshot

Final Fantasy VIII - Guardian Forces

Quezacotl

Attack: Thunder Storm
Element: Thunder
Location: From Squall's Study Panel in Balamb Garden or from Quistis at the Front Gate of Balamb Garden before going to the Fire Cavern
Quezacotl Avatar

Shiva

Attack: Diamond Dust
Element: Ice
Location: From Squall's Study Panel in Balamb Garden or from Quistis at the Front Gate of Balamb Garden before going to the Fire Cavern
Shiva Avatar

Ifrit

Attack:  Hell Fire
Element: Fire
Location: Defeat Ifrit in the Fire Cavern
Ifrit Avatar

Diablos

Attack: Dark Messenger
Element: Non Elemental (Halves Enemies HP)
Location: Summon with the Magic Lamp and defeat him
Diablos Avatar

Brothers

Attack: Brotherly Love
Element: Earth
Location: Defeat the 2 Brothers at the Tomb of the Unknown King
Brothers Avatar

Carbuncle

Attack: Ruby Light
Element: None (Casts Reflect)
Location: Draw from Iguion or Krysta
Carbuncle Avatar

Leviathan

Attack: Tsunami
Element: Water
Location: Draw from Norg or Trauma
Leviathan Avatar

Pandemona

Attack: Tornado Zone
Element: Wind
Location: Draw from Fujin or Red Giant
Pandemona Avatar

Cerberus

Attack: Counter Rockets
Element: None (Casts Double and Triple)
Location: Defeat Cerberus at Galbadia Garden or Draw from Gargantua
Cerberus Avatar

Alexander

Attack: Holy Judgement
Element: Holy
Location: Draw from Edea or Catoblepas
Alexander Avatar

Doomtrain

Attack: Runaway Train
Element: Poison (Plus several other status effects)
Location: Use Solomon Ring with 6 Steel Pipes, Remedy+, and Malboro Tentacles in your inventory
Doomtrain Avatar

Cactaur

Attack: 1,000 Needles
Element: Non Elemental
Location: Defeat Jumbo Cactaur on Cactaur Island
Cactaur Avatar

Tonberry

Attack: Chef's Knife
Element: Non Elemental
Location: Defeat 20+ Tonberrys at the Centra Ruins, then Defeat the Tonberry King
Tonberry Avatar

Bahamut

Attack: Mega Flare
Element: Non Elemental
Location: Defeat Bahamut at the Deep Sea Research Center
Bahamut Avatar

Eden

Attack: Eternal Breath
Element: Non Elemental
Location: Draw from Tiamat or Ultima Weapon
Eden Avatar

Chocobo

Attack: ChocoFire
Element: Fire
Location: Use Gysahl Greens during battle

Phoenix

Attack: Rebirth Flame
Element: Fire (Casts Life)
Location: Use a Phoenix Pinion in battle to summon him. He will appear randomly when your party dies after you summon him the first time.

Odin

Attack: Zantetsuken
Element: None (Deals Death)
Location: Defeat him in the Centra Ruins

Gilgamesh

Attack: Zantetsuken, Excalipoor, Excaliber, Masamune
Element: Non Elemental
Location: Obtain Odin before the last battle with Seifer in Lunatic Pandora